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//===- StringTable.cpp - CodeView String Table Reader/Writer ----*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "llvm/DebugInfo/CodeView/StringTable.h"
#include "llvm/Support/BinaryStream.h"
#include "llvm/Support/BinaryStreamReader.h"
#include "llvm/Support/BinaryStreamWriter.h"
using namespace llvm;
using namespace llvm::codeview;
StringTableRef::StringTableRef() {}
Error StringTableRef::initialize(BinaryStreamRef Contents) {
Stream = Contents;
return Error::success();
}
Expected<StringRef> StringTableRef::getString(uint32_t Offset) const {
BinaryStreamReader Reader(Stream);
Reader.setOffset(Offset);
StringRef Result;
if (auto EC = Reader.readCString(Result))
return std::move(EC);
return Result;
}
uint32_t StringTable::insert(StringRef S) {
auto P = Strings.insert({S, StringSize});
// If a given string didn't exist in the string table, we want to increment
// the string table size.
if (P.second)
StringSize += S.size() + 1; // +1 for '\0'
return P.first->second;
}
uint32_t StringTable::calculateSerializedSize() const { return StringSize; }
Error StringTable::commit(BinaryStreamWriter &Writer) const {
assert(Writer.bytesRemaining() == StringSize);
uint32_t MaxOffset = 1;
for (auto &Pair : Strings) {
StringRef S = Pair.getKey();
uint32_t Offset = Pair.getValue();
Writer.setOffset(Offset);
if (auto EC = Writer.writeCString(S))
return EC;
MaxOffset = std::max<uint32_t>(MaxOffset, Offset + S.size() + 1);
}
Writer.setOffset(MaxOffset);
assert(Writer.bytesRemaining() == 0);
return Error::success();
}
uint32_t StringTable::size() const { return Strings.size(); }
uint32_t StringTable::getStringId(StringRef S) const {
auto P = Strings.find(S);
assert(P != Strings.end());
return P->second;
}
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